Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16. 1969, 869 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may he purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED SEPTEMBER 8, 1970 METHOD OF PURIFYIN G VINYL MONOMERS ClarenceC. Dannelly, Rte. 8, Indian Springs 37664, and

John R. Caldwell, 404 Colonial Heights Road 37663,

both of Kingsport, Tenn.

Filed Dec. 13, 1968, Ser. No. 783,719 Int. Cl. C07c 69/54 US. Cl.260-486 No Drawing. 18 Pages Specification Vinyl monomer containing anacidic or basic organic inhibitor of free radical initiation ofpolymerization, such as a phenolic and amino compound, is treated toremove the inhibitor by contacting said vinyl monomer with an inorganicbasic or acidic compound which is insoluble in the monomer but whichreacts with the inhibitor to form a removable salt in either solid orliquid phase and thereafter separating the salt thus formed from themonomer. Suitable basic compounds are typified by the alkaline earthoxides and hydroxides and acidic compounds by inorganic acid salts.

